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Патент USA US2404668

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My 239 19%.
T. H. THOMPSQN
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FLUID TRANSMISSION
Filed Oct. 28, 1944
3 Sheets-¿Sheet l
July 23, 1946„
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I T. H. THOMPSON
FLUID Tfw».Ns1\/1IssIoNy
Filed Oct. 28, 1944
'
5 Sheets-Sheet 2
«my 23» i945
2,404,668 Q
T. H. THOMPSON
FLUID TRANSMISS ION
Filed'oct. 2a, 1944
‘
s sheets-sheet s
`
Patented July 23, 1946
2,404,668
UNITED STATES PATENT OFFICE
2,404,668
FLUID TRANSMISSION
Tom H. Thompson, Mamaroneck, N. Y., assignor
to Thompson-Wade Corporation, Detroit,
Mich., a corporation of Michigan
Application October 28, 1944, Serial No. 560,896
18 Claims. (C1. 60--53)
2
l
tral portion of each pump cylinder 8 and with a
second chamber 24 in open communication with
the central portion of each motor cylinder I2.
This invention relates to fluid transmissions
and it is an object of this invention to provide a
fluid transmission of an improved construction,
compact, reliable and of a weight suitable for
Projecting into the chamber 22 from opposite
sides of the member I6 are rotatable pivots 26 to
which is fixed an annular disk 28 which sur
use in motor vehicles. It is also an object of
this invention to provide a iiuid transmission in
which the maximum iiuid pressure is held with«
in a predetermined limit and in which the fluid
rounds the member I6. The disk 28 Vis recessed
on'its perimeter to receive roller bearings 30 on
which is mounted a ring 32 having luniformly
pressure and liquid volume supplied is automati
cally adjusted to the motor requirements.
10 spaced radially projecting pins 33, there being a
In the drawings in which a preferred construc
pin 33 for each pump piston I0. Collars 34 ro
tatably mounted on the pins 33 have projections
tion of the invention is illustrated;
Fig, 1 is a longitudinal sectional view of a fluid
35 »to which are pivotally connected ends of links
36 the other ends of which are pivotally con
transmission in accordance with this invention,
the parts being shown in the neutral or inactive 15 nected to the pump pistons I0. Secured to the
position;
`
member 20 at a iixed inclination to the axis
thereofV is a disk 38 having rotatably'mounted
Fig. 2 is a view similar to Fig. 1 with the parts
shown in the'position for reverse operation; and
thereon a ring 39 having pins 40 connected by
Figs. 3 and 4 are transverse sectional views
links 42 4to the motor pistons I4 in a manner sim
taken as on lines 3-3 and 4_4, respectively, of 20 ilar to the connection of the pins 33 to the pis
tons I0.
Fig. 1, parts being omitted in order to show the
The tubular member I 5 projects beyond the
ports and passages more clearly.
pump end of the casing I and is provided With a
In the drawings the invention is shown in con
_collar or flange 43 adapted to be connected by
nection with a transmission suitable for use onI
motor vehicles.
25 an overrunning clutch 44 to a member 45 carried
As shown in the drawings a íiuíd transmission
in accordance with this invention comprises a cy
by the vehicle frame, the clutch 44 limiting the
length of the casing I and is provided at its in
of the tubular member I6.
tubular member I6 to rotation in one direction.
lindrical casing I rotatably mounted in suitable
The interior of the tubular member I6 is provid
bearings 2 supported from members 5 carried by
ed with a threaded collar 46 in which is engaged
the vehicle'frame (not shown). The casing i is 30 a tubular member 41 having a right hand thread
arranged to rotate about its longitudinal axis but
engaged with the collari46 and a flanged inner
is limited to rotation in one direction, the direc-y
end to which is secured one end of a spring 48,
tion of engine rotation, by means or” an over-run
the other end of >whichis secured to an inwardly
ning- clutch 4 adapted to engage the casing I and
projecting collar 49 on the tubular member I5.
a member 5 attached to the vehicle frame. At 35 The outer face of the other end of the member
l 41 is shaped to form splines 50 which are slidably
one end the casing I is formed with a plurality
of pump cylinders 8 spaced uniformly about the ,
engaged with the correspondingly shaped inner
casing I and having pump pistons I5 therein
face of the adjacent end of a tubular member 52,
while at its opposite end the casing I is formed
the other end of which 'is of greater diameter
with a plurality of motor cylinders I2 having the 40 and shaped, as at 53, to form a clutch member
adapted to engage with a clutch member 54
motor pistons I4 therein. Preferably there are
driven from a suitable source of power 55.
the same number ofrmotor cylinders as pump
cylinders and for the purpose of illustration in
The member 52 is grooved, as‘at 56, for engage
the drawings the casing I is shown as formed
ment _by a shift lever 51 which is pivotally
with ñve cylinders at each end of the casing.
45 mounted,- as at 58, and serves to shift 'the mem
Rotatably mounted in the pump end of the
ber 52 into and out of engagement with the clutch
casing I is a substantially tubular member I5
member 54. The member> 52 is freely slidable
which extends inwardly for about a half of the
on the member 4l and in the closure 59 :at the end
ner end with a flange Il which is engaged by an 50
overrunning clutch I8 with'a co-operating flange
Mounted in the tubular member 52 and se
cured therein by a ring 60 secured to >the `mem
I9 of a substantially tubular member 20 jour
ber 52 so as to be reciprocated with the member
52 is a tubular member 62 having its outer end
nalled in the motor end of `.the casing I and ter
enlarged and shaped, as at B3, to form a clutch
minating in a solid portion forming a drive shaft
2l. The clutch IB is arranged to prevent the 55 member adapted to engage with a clutch member
member 20 rotating at a greater speed than the
64 driven from the source of power 55. The clutch
members 53, 54 and 63, 64-are so positioned and
~member I6 While permitting the member I6 to
arranged that only one pair of the clutch mem
rotate more rapidly than the member 20.
bers can be engaged at a time, the diiîerent pairs
The casing I is` provided with a chamber 22
which is in open communication with the cen-` 60 of the clutch members being engaged by move
3
4
ment of the lever 51 in opposite directions. The
inner end of the member 62 is slidably splined to
an end of Va tubular member 65 rotatably mounted
nected by ports 91 and 98, respectively in flanges
in the member 41 and having a left hand thread
66 engaging with a corresponding thread on the
inner face of the member 41.
u
n 65 i
The member
extends inwardly beyond the collar 49 on the
member I6 and at its innern endis providedwith.
a fiange 61 which forms a seat for a spring clusterr
68 secured in an annular chamber in al'cup'
shaped member 69 having a central stem 10 ex
99 and |89, respectively, on the tubular member
29. The ports'and passages ofthemotor end of
the casing I correspond in size and position to
the ports and passages at the pump end of the
casing» so that one end of a motor cylinder is con
nected to the interior of the tubular member 29
during a half revolution of the member 26 while
thev opposite end of that motor cylinder is con->
nected-- to the chamber 24 and the change in theV
fluid connections each half-revolution of the
member ZIìïandfdisk 38 causes a change in the end
of the motor piston I4 to which the operating
tending in opposite directions from~ the member
69. The annular chamber inthe member 69 is
pressure is applied.
'
closed by a ring 69a screwed into the member 69
The flange 89 of the tubular member I6 is
and serving to hold the vmember 65 engaged with 15
the member 69' and the spring cluster 68 under an'
initial loading of 1800 pounds. The stem 19, in
one direction, projects into' the tubular member
65' and aids‘in supporting the member 69'. TheA
extension ofthe stem 1D in the opposite direction 20
hasY journaled thereon adjacent its free< end a
ring 12‘having projecting lugs 13 to which one Vend
of links14'are pivotally‘connected. The other
ends of the linksv 14’ arepivotally connected to
provided with a passage |02- constantly open- to
the interior ofthe tubular member I6 and ex
tending to the interior of an expandible member
|93 secured to the adjacent facesl of the flange
B9 and the disk 28 so as to subject a definite area
of the disk 28 to the pressure of the iluid in the
interior of the tubular members I6 and 29.~
The casing I at one end is formed with a circle
of recesses |04 adapted to receivek a locking
the outer endsof the arms 15~flxed to the pivotal 25 plunger |95 mounted in the member 6 and nor
mally held retracted by a spring I 96. The `plunger
supports 26‘for the'disk 28'.
|95 is operated to engage in a> recess> |04- and pre
The casing‘l is providedA with passages 13- posi
vent rotation of the casing I in either: direction
tioned-` between the pump cylindersiß and' the
when the lever 51 is operatedto the “reverse’i’
motorcylinders' I2 and connecting theY chambers
22'and 24. A passage~19 extends -iî‘rom the'inner 30 position, the lever 51 being connected to. a link
|91 which is connected to a lever |68 mounted
end of- each pump cylinder 8^ to the chamber in
on the member 6 -in position to engage theiplunger
which the tubularA member I6 rotates and a pas
|95. A pin and slot connection between‘the lever
sage 39‘ extends from outer" end of each pump
cylinder Sto the samechamber. Ports 82 and 83
Vin the tubular member I6 control the connection
of the passages 19 and 80, respectively', to the
interiors of the tubular members I6 and 29;'the
passages 19 and» 80 having openings'extending
approximately 60°- about- the face‘of‘ the chamber
and the ports 82- and‘83A extending approximately
120" on the face of the tubular member I6 so that
Veach passage is open to the-interior ofthe tubular
member I6 throughout substantially a half’revolu
tion of the tubular member I6; The ports 82 and
88> are `positioned‘so that one passage 19 or 80 is
closed‘when the other passage is open. Branch
passages<84 and 85 extend from passages 19 and
89, respectively, and are connected to chamber
22 by ports 86 and 81, respectively, in iianges or
collars 88 and 89, respectively, projecting from
thetubular member I6. The passages 84 and 85
51 and link |91 permits the. lever 51 being oper
atedv to the “forward” position without operating
the plunger |05.
'
In the operation of the device, the sourceof
power being operating and rotatingÀ theA clutch
members 54» and 64, moving the operating lever
51 to the right to the “forward” position‘shiftsthe
member 52 to engage the clutch member 53. and
54 and causing the members 52 and 41 to be ro
tated. Rotating the member 41 causes the mem
ber 41’ to be shifted longitudinally (to the righi-,iin
Fig. l), owing to its right-hand thread connection
with the member I6, compressing thespring 48
and increasing the resistance` to the movement
of the member 41 in the memberlß. The> spring
48 may be designed to be compressed'solidby a
pressure of approximately 350 pounds. . The re
sistance to the rotation of member' 41inmember
also extend through an arc of approximately 60°
I9 eventually becomes suñ‘icient to cause member
and the ports 86 and 81 extend through an arc
I6 to rotate with member 41 and rotate the diskv28.
of 120° so as to establish connection> with the
Movement of member 41 to the right> hascarried
chamber 22 during a half revolution of the tubu 55 with it the members (i5V and 69 causing the disk
lar member I6, one passage 84 or 85 being closed
28 to be tilted from therpo'sition shown in Fig. 1
while the other passage is open. Ports 82 and 83
so that rotation of the disk» 28' causes -reciproca
and ports 86 and 81 are so related that one end
tion of the pump pistons I9. Rotation oi the
of a pump cylinder is connected to the interiory
casing I in the reverse direction at this time is
of the tubular member I6 While the opposite end’ ‘ prevented by the clutch 4. Asf shown, the ports
of that pump cylinder is connected to the cham
and'passages are so arrangedv that operation of
ber 22 and the ports in the tubular member I6 are
the pump pistons when the lever 51 is in the
so positioned with respect to the pivots 26 sup
“forward” position will’ cause the discharge of
porting the disk 28 that the connections estab- .
ñuid under pressure to the interiors of the tubular
lished by the ports are changed as the direction t5 membersA I6 and 28 and thence to the motor cyl
of movement of the pump pistons III are changed
inders to operate pistons I4 and fluid will be dis
-by the rotation of the disk 28.
charged from the motor cylinders to the chamber
The motor end of the casing I is similarly pro
24, passing through passages 18 to chamber 22
vided with passages 99 and 92 leading from oppo-_
and then to the pump cylinders. vOperation of
site ends of each motor cylinder to the chamber 70 the pump pistons. III by the rotation of the disk
in which the tubular member 29 revolves, com
28 accordingly builds up »fluid pressure in thein
munication with the interior of the tubular mem
teriors of the members I6 and 29 and against
ber 29 being controlled by ports 93 and 94 respec
the motor pistons I4, the pressure being builtup
tively. Extending from the passages 99 and 92
in accordance with'the resistance’ oii'ered tothe
are branch passages 95 and 96 respectively, con 76 vrotation of the shaft2ï| »and disk 38. The pressure
2,404,668
6
in the tubular members I6 and 28 is also applied
to the disk 28 through the passage |82 and mem
ber |83 in a direction to shift the disk 28 so as to
reduce the stroke of the pump pistons from their
maximum stroke but this movement of the disk
28 is yieldin-gly resisted by the springs 68, mem
ber 65 being held by its threaded connections
through member 41 with the member I6.
As the resistance to the movement of the motor
pistons I4 decreases, the rate of movement of the
pistons I4 will increase and the fluid pressure
acting against the disk 28 will decrease permitting
the spring 68 to gradually increase the tiltof the
disk 28 until the pump pistons I0 are again oper
ating at maximum stroke. The balancing of the
fluid pressure against a predetermined spring
pressure provides an automatic control which in
sures the maintenance of a supply of fluid at
maximum pressure delivered to the motor in a
volume in accordance with the instantaneous re
quirements of the motor. The transmission is
thus able to cover the entire range to maximum
torque requirement in steps of inñnitesimal mag
nitude While remaining instantaneously respon
sive to variations-in torque demand.
‘
‘
By having the volumetric capacity of the pump
greater than the volumetric capacity of the motor,
the motor eventually tends to rotate the tub-ular
member 2i) and shaft 2| faster than the speed of
rotation of the tubular member I6 but such greater
speed on the part of the member 20 is prevented
by the engagement of the over-running clutch I8.
Whenthe clutch I8 engages, theV transmission
may be'said to be in “direct drive” a condition in
which the entire transmission, ¿including the cas‘ing I, tends to revolve as a unit. With the release
of the driving power lfrom the‘member 52, the
tendency of the member 41 to rotate in the mem
ber I6 against the action of the spring 48 is ended
and the spring 48 tends to rotate the member 41
in the member I6 and shift the members 65 and
69 to the left to their initial positions and thus
operate the disk 28 to reduce its inclination and
the'stroke of the pump pistons II).
1. In a iluid transmission, a casing, pump pls
tons `mounted for reciprocation in said casing, a
disk in said casing, means supporting said disk
for relative rotation of said disk and pistons com
prising means connecting said disk and its sup
porting means permitting variation of the inclina
tion of the plane of said- disk relative to the axes
of said pistons, means operatively connecting said
`disk and pump pistons to reciprocate said pistons
upon relative rotation of said disk and pistons
and driving means for relatively rotating said disk
and pistons comprising means responsive to the
resistance to said relative rotation for selectively
inclining the plane of said disk relative to the
axes of said pistons.
2. In a fluid transmission, a casing, pump pis
tons mounted for reciprocation in said casing, a
disk in said casing, means supporting said disk
for relative rotation of said disk and pistons com
pricing means connecting said disk and its sup
porting means permitting variation of the inclina
ton of the plane of said disk relative to the axes
of said pistons, means operatively connecting said
disk and pump pistons to reciprocate said pistons
upon relative rotation of said disk and pistons,
driving means for relatively rotating said disk and
pistons comprising means responsive to the resist
ance to said relative rotation for selectively in
clining the plane of said disk relative to the axes
of said pistons.
3. In a fluid transmission, a casing, pump pis
tons mounted for reciprocation insaid casing, a
disk'in said casing, means supporting said disk
for relative rotation cf said disk and pistons com
prising means connecting said disk and its sup
"
porting means permitting variation of the incli
nation of the'plane of said disk relative to the
axes of said pistons, means operatively connect
ing said disk and pistons to reciprocate said pis
40 tons upon relative rotation of said disk and pis
tons, driving means for relatively rotating said
disk and pistons comprising means responsive to
the resistance to rotation of said disk for inclin
ing the plane of said disk relative to the axes 0f
To obtain a reverse operation of the transmis 45 said pistons‘and means to apply the fluid pres
sure generated by said pump pistons for changing
sion the lever 51 is moved forward to the “reverse” »
the inclination of said disk to reduce the stroke
position shifting the member v'52 away from the
of said pump pistons.
clutch member 54 and carrying the member 62 to
4. In a fluid transmission, a casing, pump
the right, as shown in Fig. 2, to engage the clutch
members 63 and 64. With the clutch members 50 pistons mounted for reciprocation in said casing,
a disk in said casing, means supporting said disk
83 and 84 engaged the members `62 and 65 will
for relative rotation of said disk and pistons com
be rotated in the same direction as was the mem
prising means connecting said disk and its sup
ber 52 but the left hand thread connection of the
porting means permitting variation of the in
member 65 >with the member 41 will cause the
member> 65 to’ be shifted to the left as it is ro 55 clination of the plane of the disk relative to the
axes of said pistons, means‘operatively connect
tated, drawing with it the member 69 and its
ing said disk and pistons to reciprocate said
stem 10 and through links 14, arms 15 and pivots
pistons upon relative rotation of said disk and f
26, tilting the disk 28 in the opposite direction
pistons, driving means for relatively rotating said
until further Vtilting movement of the disk is pre
vented by the stop IIB." 'This tilting movement 60 disk and pistons comprising means responsive to
the resistance to 'rotation of said disk for inclin
of the disk 28 effects a movement "of the pump
ing the plane of saidY disk relative to the axes‘of
pistons IEI and changes the relation of the disk
said pistons and means to apply fluid pressure
28 and pump pistons I8 with respect to the valve
generated by said pump in a direction to reduce
ports 82, 83 and 86, 81 so that the pump pistons
the inclination of the plane of said disk.
I0 now discharge fluid under pressure to the
chamber 22 and through passages 18 to chamber
5. In a fluid transmission, a casing, pump
pistons mounted Vfor reciprocation in said casing,
24 and then to` the motor cylinders `while fluid
is supplied to the pump cylinders from the in
a disk in said casing, means supporting said'disk
for rotary movement and movement about a
terior of the tubular members I6 and‘20. " As the
relation of the disk 38 and the tubular member
second axis at an angle to the axis of rotation,
28 is not changed reversing the tilt of the disk 28
means operatively connecting said disk and pis
causes a reversal in the operation of the> motor
tons for reciprocating said pistons upon rotation
pistons I4 and the rotation of the disk 38 and
of said disk and drive means for rotating said
disk, said drive means having selectively oper
tubular member2Il and shaft' 2|.
' '
'
’ What‘is claimed’is:
'
ated means responsive ‘to the resistance to rota
2,404,668
tion of said disk for moving said disk about said
8
tons for reciprocating said pistons upon rotation
second yaxis upon operation of said drive-means
of saidl disk and drive means vvfor rotatingV said
to rotate said disk.
disk, said drive means comprising tubular means
threaded intossaid disk supporting means, power
receiving means adapted to rotate said tubular
means, yielding .means opposing relative move
ment of said tubular means and. said disk sup
i
6. In a fluid transmission, a casing, pump
pistons'mounted for reciprocation in said casing,
a disk in said casing, means supporting said‘disk
for rotary movement and' movement about a sec
ond axis at an angle to the axis of rotation,
porting means upon operation ‘oi’v said .power re
means operatively connecting said disk and pis
ceiving means to- rotate said disk and means con
tons for reciprocating said pistons upon rotation l0 necting said tubular means and disk to move said
of'sa'id disk and selectively operated drive means
disk aboutsaid second axis upon relative move
for rotating said disk, saidA drive means com
ment of said tubular means and `said disk sup-v
prising engaging co-afxiall members relatively
porting means.
Y _
shifted by the'resistance to rotation of said disk
1l. In a fluid transmission, a casing, pump
to move said disk about said secondV axis upon 16 pistons mounted for reciprocation in said casing,
operation'of said drive means to rotate said disk.
a. disk in said casing.,v means supporting said disk
7. In a fluid transmission, a casing, pump
for rotary movement and movement about a
pistons mounted for reciprocation in said casing,
second axis at an angle to the axis of rotation,
a disk in said casing, means supporting said disk
means operatively connecting said disk' andi pis
for rotary movement and movement aboutv a 20 tons for reciprocating said pistons upon rotation
second axisat an angle to the axis of rotation,
of said disk, drive means for rotating said disk
means‘operatively vconnecting said disk and pis
tonsfor reciprocating said pistons upon rotation
and means for applying fluid pressure generated
by said pistons to move said-disk about said sec
of said diskv and drive means for rotating said
ond axis, said drive means comprising tubular
disk, said drive means comprising engaging co 25 means threaded into said disk supporting means,
axial members, means for relatively shifting said
co-ax-ial members to move said disk about said
second axis upon operation of said drive means
to-rotate said disk and means yieldingly oppos
ing said relative movement of said co-axiai mem
bers upon operation of said drive meansA to, ro
tate said disk.
.
power receiving ¿means adapted to rotate said
tubular means,` yielding means opposing relative
movement of said tubular means and said disk
supporting means upon operation of said power
.receiving means to rotate said disk and means
connecting ’_said Ytubular _means and disk to move
said disk about said second axis upon relative
8. In a fluid transmission, a casing, «pump
movement kof said tubular means and saidl disk
supporting means, said connecting means having
a disk in said casing, means supporting said disk 35 yielding means opposing .movement of said disk by
pistons mounted for reciprocation in said casing,
for rotary movement andmovement about a sec
ond axis at an angle to the axis of rotation,
means operatively connecting said disk and, pis
tons for reciprocation said pistons upon rotation
the lfluid pressure.
e
'
'
12. In a iiuid transmission,` a casing, pump
Ypistons >mounted for reciprocation in said casing,
a disk in said casing; means supporting said disk
of said disk and drive means for rotating said 40 for rotary movement and movement about a
disk, said drive means comprising engaging co
second axis at an angle to the axis of rotation,
axial members, means forY relatively shifting said
means» operatively connecting said disk and pis
co-axial member to move saiddisk about said
ton’sfor reciprocating said pistons upon rotation
second axis upon operation of said drive means
of‘said disk, drive means for rotating said disk,
to rotate said disk and a spring means opposing 45 said drive means having means responsive to the
said relative movement of said co-axial mein
bers upon operation of said drive means to ro
tate said disk, said spring means operating to
resistance to rotation of said disk for Vmoving said
disk about said second axis upon operation of
said drive means to rotate said disk, a second
diskV in said casing, means rotatably'supporting
return said co-axial members to their initial po
sitions upon the Withdrawal of the' driving power 50 said second disk, motor` pistons mounted for re'
ciprocation in said casing, means connecting
from said drive means.
said motor pistons and said second disk t'o ro
9. In a fluid transmission, a casing, pump
pistons mounted for reciprocation in said casing,
a disk in said casing, meanssupporting saidV disk
tate said second'diskV upon reciprocation of said
motor pistons, said casing having passages for
for rotary movement and movement about ai sec 55 _the supply of fluid under pressure between said
pump and motor pistons and ports in said disk
ond axis at an angle to the axis of rotation,
supporting means controlling said passages.
.means operatively connecting said disk and pis
tons for reciprocatingY said pistons upon rotation
of said disk and drive means for rotating said
13; In a> ñuid transmission, a> casing, pump
pistons mounted for reciprocation in said casing,
disk, said drive means comprising a pair of power . 60 a disk in> said casing„means supporting said disk
for rotary: movement and movement about` a
Vreceiving members, co-axial members _operated
by said power receiving members and means for
relatively shifting co-axial members to mover said
disk about said second axis upon operation. of
either of said power receiving members` to ro 65
second axis at an angle to theaxis of rotation,
tate said disk, said power receiving members and
means> operatively connecting said disk and pis'
tons-for reciprocating said .pistons upon rotation
ofl said disk, drive means for rotating said disk,
said drive means having means responsivel to the
said co-axial members being, constructed and ar
resistance to rotation of said disk for moving said
ranged Vto move saiddisk in'opposite directions
disk about saidï second axis upon operation of
aboutsaid second axis.
said‘drive means »to rotate said disk, a second disk
in said casing, means rotatably supporting Vs'aid
10. In a fluid transmission, `a casing, pump
pistons mounted for» reciprocation in said cas'
ing, a disk in's'aid casing, means supportingsaid
disk for rotary movement'andmovement. about
a secondA axis at anangle to the axis of rotation,
means] operatively' coiinectin'gjsaid' `disk a'r'idfpi's
secondv disk, motor pistons mounted for recipro
cation'in said casing, means connecting' said'
motor pistons and' said second disk to rotate
said second disk upon reciprocation of said' mo
tor pistons, said ca’sin'g‘havi-ng Vpassages."for the
2,404,668
l0
supply of ñuid under pressure between said pump
and motor pistons, ports in said disk supporting
means controlling said passages and clutch
means connecting said disk supporting means
and preventing said second disk supporting means
from rotating faster than said first disk support
ing means.
14. In a fluid transmission, a casing, pump
pistons mounted for reciprocation in said casing,
a disk in said casing, means supporting said disk
for rotary movement and movement about a
second axis at an angle to the axis of rotation,
means operatively connecting said disk and pis
tons for reciprocating said ‘pistons upon rota
tion of said disk, drive means for rotating said
disk, said drive means having means responsive
to the resistance to rotation of said disk for
moving said disk about said second axis upon
operation of said drive means to rotate said disk,
a second disk in said casing, means rotatably sup
porting said second disk, motor pistons mounted
for reciprocation in said casing. means connect
ing said motor pistons and said second disk to
rotate said second disk upon reciprocation of
said motor pistons, said casing having passages
for the supply of fluid under pressure between
said pump and motor pistons and ports in said
disk supporting means controlling said passages,
said driving means for said first disk comprising
means for varying the relation of said pump pis- ._
ond disk, motor pistons mounted for reciproca
tion in said casing, means connecting said motor
pistons and said second disk to rotate said second
disk upon reciprocation of said motor pistons,.said
casing having passages for the supply of ñuid
between said pump and motor pistons,l said disk
supporting means having ports controlling said
passages and said second disk changing its direc
tion of rotation upon a change in the driving
means for said first disk.
17. In a fluid transmission, a casing, pump
pistons mounted for reciprocation in said casing,
a disk in said casing, means supporting `said disk
for rotary movement and movement about a sec
and axis at an angle to the axis of rotation, means
operatively connecting said disk and pistons for
reciprocating said pistons upon rotation of said
disk, drive means for rotating said disk, said
drive means having means responsive to the re
sistance to rotation of said disk for moving said
disk about said second axis upon operation of said
drive means to rotate said disk, a second disk in
said casing, `means rotatabls7 supporting said sec
ond disk, motor pistons mounted for reciproca
tion in said casing, means connecting said motor
pistons and said second disk to rotate said sec
ond disk upon reciprocation of said motor pis
tons, said casing having passages for -the supply’
of fluid under pressure between said pump and
motor pistons, ports in said disk supporting means
controlling said passages, clutch means connect
ing said disk supporting means and preventing
said second disk supporting means from rotating
tation of said second disk.
faster than said first disk supporting means and
15. In a fluid transmission, a casing, pump
clutch means preventing rotation of said casing
pistons mounted for reciprocation in said casing,
in a direction opposite to the direction of rota
a disk in said casing, means supporting said disk
tien of said iirst disk While permitting rotation
for rotary movement and movement about a
of said casing in the direction of rotation of said
second axis at an angle to the axis of rotation,
first disk.
means operatively connecting said disk and pis
18. In a fluid transmission, a casing, pump pis
tons for reciprocating said pistons upon rota 40
tons mounted for reciprocation in said casing, a
tion of said disk, drive means for rotating said
disk in said casing, means supporting said disk for
disk, a second disk in said casing, means rotat
rotary movement and movement about a second
ably supporting said second disk, motor pistons
axis at an angle to the axis of rotation, means op
mounted for reciprocation in said casing, means
connecting said motor pistons and said second 45 eratively connecting said disk and pistons for
reciprocating said pistons upon rotation of said
disk to rotate said second disk upon reciproca
disk, a drive means for rotating said disk sup
tion of said motor pistons, said casing having
porting means and disk comprising means for
passages for the supply of fluid under pressure
rotating said disk in one direction about said sec
between said pump and motor piston and ports
,in said disk supporting means controlling said 50 ond aids, a second drive means for rotating said
disk supporting means and disk comprising means
passages, said drive means for said first disk hav
for rotating said disk in the opposite direction
ing selectively operated means responsive to the
about `saisi second axis, a second disk in said
resistance to rotation of said disk for rotating
casing, means rotatably supporting said second
said disk about said second axis to reverse the
55 disk, motor pistons mounted for reciprocation in
direction of rotation of said second disk.
said casing, means connecting said motor pistons
16. In a fluid transmission, a casing, pump
and said second disk to rotate said second disk
pistons mounted for reciprocation in said casing,
upon reciprocation of said motor pistons, said
a disk in said casing, means sup-porting said disk
casing having passages for the supply of fluid
for rotary movement and movement about a sec
between said pump and motor pistons, said disk
ond axis at an angle to the axis of rotation, 60 supporting means having ports controlling said
means operatively connecting said disk and pis
passages and said second disk changing its direc
tons for reciprocating said pistons upon rotation
tion of rotation upon a change in the driving
of said disk, a drive means for rotating said disk
means for said ñrst disk, clutch means prevent
supporting means and disk comprising means
65 ing rotation of said casing in a direction opposite
for rotating said disk in one direction about said
to the rotation of said ñrst disk while permitting
second axis, a second drive means for rotating
rotation of said casing in the direction of rota
said disk supporting means and disk comprising
tion of said ñrst disk when said iirst drive means
means for rotating said disk in the opposite di
is operated and means preventing rotation of said
rection about ysaid second axis, a second disk in 70 casing when said second drive means is operated.
said casing, means rotatably supporting said sec
TOM H. THOMPSON.
tons and said first disk to the ports in said first
disk supporting means to effect a reversal of ro
"
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